package com.sky.controller.user;

import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
@RequestMapping("/user/dish")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;
    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @ApiOperation(value = "根据分类id查询菜品")
    @GetMapping("/list")
    public Result<List<DishVO>> list(@RequestParam Long categoryId){
        //构造redis中的key
        String key = "dish_"+categoryId;
        //查询redis中是否存在缓存数据
        List<DishVO> dishVOS = (List<DishVO>) redisTemplate.opsForValue().get(key);
        //若存在，直接返回，不用查数据库
        if(dishVOS !=null&& dishVOS.size()>0){
            log.info("使用缓存数据{}",key);
            return Result.success(dishVOS);
        }
        //不存在，查询数据库,并将查询结果放入缓存中
        dishVOS = dishService.listWithFlavor(categoryId);
        redisTemplate.opsForValue().set(key,dishVOS);
        return Result.success(dishVOS);
    }
}
